No, they usually just ask questions that pertain to your previous employment. They will teach you a little bit about union history in your first year and throughout your apprenticeship.
They will ask you to tell them what you did in certain situations and how you handled others.
It really isn't that bad as long as you are even a little out-going. If not then find a way to let loosen up and go with the flow.
"If common sense was common, everyone would have it"-not sure, someone here